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No Mfodel.) 2 sneets-fsheet 1. H.- STOALL 8v' F. MABRGKLIN. S'IRAIGHTKNITTING MACHINE No. 523,820. Patented my 31,1894.

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No. v523,820

v 2 Sheets-Sheet 2. H. STDLL" & P. MABRG'KLIIL STRAIGHT KNITTINGMACHINE.

PatentedJuly 31, 1894.

Lnno.. wAsmNaToN D c UNITED STATES PATRT OFFICE.

HEINRICH STOLL AND FRIEDRICH MAERCKLIN, OF REUTLINGEN,GERMANY.

STRAIGHT-KNITTING MACHIN El.\

SPECIFICATION forming part of LettersPatent No. 523,820, dated July 31,18.94. l

Application tiled June 30,1893. Serial No. 479,311. (No model.) Patentedin Germany August 11,1891,No.62,734; inSWitzerland October 30, 1891, No.4,514, and May '7, 1892, No. 5,160; in France October 30, 1891, No.217,108; in Austria-Hungary October 30, 1891'. No. 51,805 and No.82,581; in England December 8, 1891, No. 21,451, and in Italy October22, 1892,

XXVII, 32,875, LXVIII, 440.

lT @ZZ whom it may con/cern.-

Be it knownthat we, HEINRICH SToLI. and FRIEDRICH MARRCKLIN, subjects ofthe Emperor of Germany, and residents of Reutlingen, in the Kingdom ofWurtemberg, Germany, have invented certain new and useful ImprovementsinStraight-Knitting Machines, (patented in Germany, No.` 62,734, datedAugust 1, 1891; in Switzerland, No.

Io 4,514, dated October 30, 1891, and No. 5,160,

dated May 7, 1892; in France, No. 217,108,"

dated October 30, 1891; :in Austria-Hungary, No. 51,805- and No. 82,581,dated October 30, 1891; in England, N o. 21,451, dated December I5 8,1891, and in Italy, Reg. Gen., Vol. XXVII, N o. 32,875, Reg. Attest,Vol. LXVIII, No. 440, Ydated October 22, 1892,) of which the followingis a specification.V y f Our invention relates to knitting machines. Theobject of our invention is to vrsimplify the construction of at knittingmachines, without reducing the 'efficiency in'any way.

With this obj ectin view, our invention consistsin such features ot'construction and comz 5 bination of parts as will first be described inconnection with the accompanying drawings and then particularly pointedout in the claims. p

In the ldrawings-'--Figure v1 is aplan view of 3o so much of, a flatknitting machine as is necessary to illustratefourinvention. Figs. 2,3,

and l4 are transverse,'sectional views of 'thel same showing theneedles` in dierent posi'- tions. Fig. 5 is a bottom, plan view of the 35 cam mechanism. Fig. 6 is a detail, sectional view on the line AB, Fig.5. Fig. 7 is a similar View on the line O-- `D,v Fig. 5. Fig.

8 is a similar view on the line E-F, Fig. 5.

As will be seen from Figs. 2, 3, and 4, the 4o two needle-,beds areplaced in one plane, and a double needle, c, of the form shown in Figs.2, 3, and 4 is employed. This needle consists of a central body or shaftprovided with hooks and latches at both ends. This double needleispushed alternatelyfrom the needle-chan nel or slot of one needle-bed,e, tothe corresponding channel of the opposite needle-bed,

e, by the operation of the carriage. This is `effected by means of thejacke, b, which have 5'ofthe forms shown in Figs-2, 3 and 4, beingprovided with the toothed inner ends, c, and with the upward-extendinglug or arm, d, which projects above the slotted needle-bed,

so as to become engaged by the cams, in order that the jacksmay bepushed to and fro. When the jacks of `one side are pushed inward by thecams, they forcev the needles toward theopposite side and then releasethem, e

whereupon the jacks of the opposite side draw the needles some distancetoward their own side and then push them forward toward the oppositeside and release them. In operating the needles, the toothed ends, c, ofthe jacks engage the hooked ends of the needles, s and hence it becomesnecessary to employ yspecial mechanism for releasing the jacks from theneedles. This is done by the following mechanism: On both carriage parts'or sley-parts, f, are secured butt-platea@ on top of which are mountedthe angle pieces, g,`by 7o means ofrsuitable screws. Each angle pieceforms an inclined plane (see Figs. 2, 3 and 4), up which the innerendsof thejacks are forced by the longitudinal movement of the jacks whenpushed inward by'fthe cams, the 75 toothed ends, @gliding upward andthereby releasing the hooked ends of the needles. Now, theconstruction.v ofl the `machine is such that, "on'the one hand, thejacks are pushed earlier, so that the needles, approachingl from the`other side', can be Apushed in under the toothed ends of said jacks, andthat these 'returnvv earlier into the'lower position, to grasp and drawback'the ',needles. Then the'other needle-ends'cannot be grasped by'85the descending ends ofthe jacks on their sides. To'obtain these results,the intermediate cam-block, n, on one side 'of the machine is notdirectly opposite that on the'other side of the machine, that is tosay,they are out of line, as will be seen from Figs. 1 and 5.

The jacks are guided by a curved opening or rounded groove, i', as soonas their toothed ends, c, glide up the inclined planeJt. These grooves,t', are cut in the inner faces of the 9 5 angle pieces, c', which aresecured to the car riage portions, f, by screws, f. The form of thesegrooves is better illustrated in Fig. 6, which is a section on the lineA-B, Fig, 5 As the jacks are drawn in, they are forced roo hanging atthe left.

downward, sliding along the inclined planes until finally lowered totheir positions in the needle-slots.

In order to permit thejacks to drop freely, the inclined planes, h, arecut away somewhat, as at 7c. On the inner` free ends of the two carriageor sley-parts, f, the latch openers, Z, are arranged.

When the carriage is in the starting position, and the loops on theright side, thejacks on the right have grasped the needles, while thejacks at the left are free, as shown in Fig. 4.

As the carriage moves in the direction of the arrow, Fig. l, thefollowing occurs: The jacks are pushed inward at both sides by the cams,and as the latter are not directly opposite each other, those jacks atthe left are pushed inward earlier than those at the right. These latterones push the needles in the direction of the arrow, Fig. 2, until theleft ends of the needles are placed directly under the toothed ends, c,of the jacks which have been lifted at the left side by the inclinedplane, h. At the same moment, the toothed ends, c, of the other jacksleave the needles, being directed upward by the inclined plane, h, atthe right. Now thejacks at the left fall from the inclinedplane on theirsides and engage the needles, drawing them toward the left. The hookedends at the right of the needles catch the yarn, while the needles arewithdrawn from the loops formed before, which are attached to thetexture beyond. As soon as the carriage has traveled to ythe other side,the new loops are The carriage then moves backward, that is, in adirection opposite to the arrow. The needles are pushed again to theright, as indicated by the arrow in Fig. 3, whereupon the operation isreversed and the new meshes formed at the right. In this manner, theneedles are pushed alternately to the left and right and by this meansthe ware is produced.

As shown in Figs. 1, 3, and 5, the middlecams are constructed in twoparts, whereby it is possible to operate only one side of the machine ifdesired.

Each cam-device consists of an outer stationary cam, m, an innerstationary cam, fn', an intermediate movable cam or block, n, and twolateral adjustable cams, m', as will be plain from Fig. 5. Theintermediate cam, fn, is provided with a stud, o, which projects upwardthrough the plate, f, and is slotted at its upper end, a lever, o',being pivoted in the slot. Between the plate, f,and the cam-block, fn,is placed a spiral spring, 02, surrounding the stud and normally tendingto hold the cam-block, n, in its lowered position. By raising the lever,o',to avertical position, the stud will be raised, and with it, thecam-block, fn. Between the inner cam,fn., and the outer cam, m, isformed an irregular space which is the race-way for the upward-extendinglugs, d, on the jacks of its respective side. This race-way is anirregular path, as will be fully understood from Fig. 5, where it willbe seen that each inner cam-block, n', has a wing, n2, which projectsoutward, the wing of one camblock, n', being on the side opposite thatof the other cam, so that the part of one raceway which is nearest theinner portion of the machine is directly opposite the wing of the othercam.

The race-way is contracted by the intermediate cam-block, fn, when thelatter is in its lower position, whereby the jacks will be forced inwardto the full limit, whereas, when the cam-block, n, is raised, the lugs,d, on the jacks, will not be forced inward to the full extent.Therefore, `when one of the camn blocksm. is raised, the jackson oneside, only, will be worked, thereby knitting on one side, only, as willbe fully understood by those skilled in the art.

The lateral cams, m', are each capable of being adj usted inward oroutward, by means of upward-projecting pins, m2, which pass throughslotted openings in the plate, f, and are provided with thumb-nuts, m3,by which the lateral cams may be moved or fastened at any desiredposition, whereby the jacks may be moved outward to a greater orlesseXtent, as desired. l

By the lifting of the cam-block, fn., at the left, the race-way iscontracted so that only the outer part, m, operates. This cannotentirely move the jacks at the left, so, therefore, they cannot reachthe inclined plane, h. In this way also the needles are not pushedentirely to the right, so they cannot be grasped by the jacks falling atthe right. On the contrary, they are withdrawn by the jacks at the left,the hooks at the right hand ends of the needles catching the yarn andpulling it through the loops formed before, which loops are attached tothe ware beyond. When the carriage moves backward again, the work j ustdescribed is repeated at the same side.

By lifting the cam block, fn., of the cam at the right of the machine,the operation described above will be repeated at the right, as will befully understood by those skilled in the art. By this construction itwill be seen that it is possible to knit on either the right or leftside, or both if desired.

As latch needles are employed in this machine, it becomes necessary touse means for preventing the latches from being forced into the yarnwhen operating. This is done by the butt-plates, 1*,heretoforementioned,which prevent the turning backward of the opened tongues orlatches when the needles are moving below the said butt-plates orcovering plates. To these covering plates the latch openers, vZ, aresecured.

In order to allow to move freely under the covering plates, 0^, thelatter are provided with suitable grooves or concavities, fr', as shownin Figs.'7 and 8.

Having thus fully described our invention, what we claim, and desire tosecure by Letters Patent, is-

theopened needle-latches ICO 'IIO

f forth.

1. In a knitting machine, needle-beds,ase

ries of needles having latches at each end,

2. In a knitting machine, the combination,-

with a pair of needle-beds, a series of needles having latches at eachend, and a series of jacks located in the beds and arranged to engagethe needles, of a pair of covering plates above the needles and providedwithinclined planes, substantially as set forth.

3. In a knitting machine, the combination, with a pair of needle-beds, aseries of needles having latches at each end, and a series of jackslocated in the beds and arranged to engage the needles, of a pair ofcovering plates above the needles and provided with inclined planes, anda pair of angle pieces, each having a groove on its under side in whichthe jacks are guided when elevated b'y their respective inclined planes,substantially as set ering plates attached to the carriage, and alatch-opener at each end of each covering plate, substantially as setforth.

5. In a knitting machine, the combination, with a pair of needle-beds,and a series of needles having latches at each end, of a carriage havingmeans for operating the needles and moving over the needle-beds, and apair of covering plates attached to the carriage, each plate having apair of concavities, fr', in its under side, substantially as set forth.

6. In a knitting machine, the combination, with a carriage, and an innerand an outer cam secured to the carriage and having a raceway betweenthem, the inner cam having an outward-projecting wing, of anintermediate cam-block movable in the'race-,way and 1ocated at one sideof the wing of the inner cam, substantially as set forth.

7. In a knitting machine, the combination, with a carriage, and an innerand an outer fixed cam secured to the carriage and having a race-waybetween them, theinner cam having an outward-projecting wing, of a pairof adjustable lateral cams, one on each side of the fixed cams, and amovable. cam-block 1o- A.cated in the race-way between the inner andouter cams, substantially as set forth.

' In testimony that We claim the foregoing as our invention we havesigned our names in presence of two subscribing witnesses.

HEINRICH STOLL. c FRIEDRICH MAERCKLIN.

Witnesses:

ANTON EIFERT, CHRISTIAN GROTZ,

Both of Reutlingen.

